Showing results for 
Search instead for 
Did you mean: 
Get help with Large Format Printers, with direct access to all Latex Knowledge Center · Ask anything · Find anything · Share anything at HP LKC
New member
1 0 0 0
Message 1 of 3
Flag Post

HP Latex L28500 Magenta Ink Issue

HP Recommended
Latex 28500
macOS 10.14 Mojave

Hi community, 

Hoping to get some thoughts here on a magenta ink printing issue, or lack thereof. During a 50 foot run of posters, the magenta ink faded out, and the print turned from bright red to dull orange.


Initially I thought this was a problem with the printheads, so I swapped both M/LM heads out for new ones. Still the same

Print status plot is "printing" in the magenta area, but it looks identical to the light magenta.


Swapped out a brand new magenta cartridge, and ran a few cleanings. Still the same. 


Called a local technician and they seem to think that we have a bad batch of ink (light magenta in the magenta cartridge). Has this ever happened to anyone before? 


Level 16
Level 16
33,260 32,737 3,051 11,062
Message 2 of 3
Flag Post
HP Recommended



First off.. You are welcome here.

I am not trying to chase you away.


Having said that, "we" may not be the best ones to ask since most of our focus (and expertise) is in the area of consumer and small business printers, you know - those itty-bitty printers that fit on a desk.  Smiling.


Latex Printing has its own Website dedicated to your kind of tech.


HP Latex Printer Knowledge Center


Thank you for participating in the HP Community Forum.

We are a world community of HP enthusiasts dedicated to supporting HP technology.

Click Thumbs Up on a post to say Thank You!

Answered? Click post "Accept as Solution" to help others find it.




Was this reply helpful? Yes No
Level 5
249 247 13 34
Message 3 of 3
Flag Post
HP Recommended


sometimes when ink cartridge isn't shaken well when inserted, in the tubes is circulating solution - not color itself. That's an option too - defective batch, but to see if the new cartridge is defective or same like LM, tubes must be flushed and load ink from new cartridge (or use about 30-40 ml from magenta - what actually is in the tubes).

Was this reply helpful? Yes No
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation